Great to hear Natural Golf has helped your game!
Regarding hooks; they are primarily caused by a closed clubface at impact. Check to be certain your lead hand hold conforms to the one demonstrated in
this Article and the Quick Start Video (link found on same page). Here is
another Article I wrote that may help clarify further...and here is
a Video too!
Regarding pulls; they are primarily caused by a forward swing path that is from "out to in" or left of the target line for right-handers. Check out
this Video for some guidance.
Keep in touch, let us know how it goes and if we can help further. Also, if you would like to forward a picture or two of you playing I think it would be great!
Cheers!